[Webkit-unassigned] [Bug 102822] New: 2.5% regression on page cycler moz

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=102822

           Summary: 2.5% regression on page cycler moz
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: Unspecified
        OS/Version: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: Page Loading
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: ojan at chromium.org
                CC: koivisto at iki.fi, abarth at webkit.org,
                    simon.fraser at apple.com, akling at apple.com,
                    haraken at chromium.org


It's a bit hard to see the regression, but it's definitely there. The way to see it is to compare the difference between the reference trace (t_ref), which does not have the new patches, to the non-reference traces, which do have the new patches. 

http://build.chromium.org/f/chromium/perf/linux-release-webkit-latest/moz-http/report.html?rev=168773&graph=times&history=50
http://build.chromium.org/f/chromium/perf/linux-release-webkit-latest/moz/report.html?rev=168773&graph=times&history=50

Regression range: http://trac.webkit.org/log/?verbose=on&rev=135087&stop_rev=135070

Hard to be sure which of those patches is most likely. I would guess one of the antti/kling patches. But it could also be smfr. Or maybe one of haraken's V8 patches, although those were supposed to just be cleanups with no other effects.

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